I'm sure someone has the answer to the following, on Duncan's site under the 3100's data sheet 1.0 and 1.6 and the user manual, the frequency range differs from 35Hz to + 20Khz to 45Hz to +20Khz, and whilst data sheets shows two amps at 75 Watts, the user manual shows 75W for bass and mids and 50W for tweeter.

Was there a change from first to later models?

Whilst not a real issue in a two or even a 5.1 setup, it can however have significant impact on on desired crossover settings to subs and electrical power requirement when using all 3100's in a large Dolby Atmos or DTX Pro setup.

Gerard.

Home Theater: LG 4K C7, HD621, G61RSL, Oppo 203, MS600, DSP3100 L & R, 2x3100's centers and 4xDSP3100's surrounds. 2x REL S3 SHO and 2x REL habitat1 subwoofers.
Music & TV: Sony 4k XBR 65", Oppo 203, HD621, G68D, C15, 588, M10, M20's, M33's, 4xDSP33's
MD600, 2xTwinStores.. 2xMS600, F80, Prime headphone and PSU.